S. Ünsal Karhan

ORCID: 0000-0003-0161-6133
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Research Areas
  • Marine Ecology and Invasive Species
  • Marine Biology and Ecology Research
  • Fish Biology and Ecology Studies
  • Marine and environmental studies
  • Coral and Marine Ecosystems Studies
  • Ichthyology and Marine Biology
  • Marine Biology and Environmental Chemistry
  • Echinoderm biology and ecology
  • Marine and coastal plant biology
  • Parasite Biology and Host Interactions
  • Fish Ecology and Management Studies
  • Identification and Quantification in Food
  • Crustacean biology and ecology
  • Mollusks and Parasites Studies
  • Marine and fisheries research
  • Marine Bivalve and Aquaculture Studies
  • Genetic diversity and population structure
  • Marine Sponges and Natural Products
  • Archaeology and Natural History
  • Environmental Science and Water Management
  • Isotope Analysis in Ecology
  • Agricultural and Rural Development Research
  • Planarian Biology and Electrostimulation
  • Aquatic Invertebrate Ecology and Behavior
  • Maritime Security and History

Boğaziçi University
2021-2023

Istanbul University
2007-2021

Bahçeşehir University
2021

Middle East Technical University
2021

Nevşehir Hacı Bektaş Veli University
2013

The provenance of white sharks ( Carcharodon carcharias ) in the Mediterranean is both a conundrum and an important conservation issue. Considering this species's propensity for natal philopatry, any evidence that stock has little or no contemporary immigration from Atlantic would suggest it extraordinarily vulnerable. To address issue we sequenced mitochondrial control region four rare sharks. Unexpectedly, juvenile sequences were identical although collected at different locations times,...

10.1098/rspb.2010.1856 article EN Proceedings of the Royal Society B Biological Sciences 2010-11-17

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 91:137-150 (2010) - DOI: https://doi.org/10.3354/dao02256 Dasyatispora levantinae gen. et sp. nov., a new microsporidian parasite from common stingray Dasyatis pastinaca in eastern Mediterranean Ariel Diamant1,*, Menachem Goren2, M. Baki Yokeş3, Bella S. Galil4, Yaelle Klopman2, Dorothée Huchon2, Amir Szitenberg2,...

10.3354/dao02256 article EN Diseases of Aquatic Organisms 2010-06-29

DNA barcoding is a useful tool for the identification and potential discovery of new species. In this study, was employed by sequencing mitochondrial cytochrome oxidase subunit I gene (COI) to characterize genetic diversity 12 shrimp species inhabiting Turkish coastal waters and, when possible, compare with data available from different parts Mediterranean eastern Atlantic. This study also comprises first performed in Seas using COI. A total 40 specimens were collected analyzed 9 sites....

10.12681/mms.548 article EN Mediterranean Marine Science 2014-05-26

In the present article, new records are given for 18 species (6 native, 9 alien and 3 cryptogenic), belonging to 5 Phyla (i.e. Chlorophyta, Cnidaria, Annelida, Mollusca Chordata), from 8 Mediterranean countries: Spain: A large population of Polycerellaemertoni reported Ebro Delta, presence Spinimuricea klavereni is confirmed first time in Catalan coast; Italy: record Cryptonome turcica extends its distribution western Sea, findings Mawia benovici constitute southernmost this Adriatic Sea;...

10.12681/mms.19386 article EN Mediterranean Marine Science 2018-12-31

OKUDAN, E.S., DEMIR, V., KALKAN, E and KARHAN, S.U., 2011. Anchoring Damage on Seagrass-Meadows (Posidonia oceanica (L.) Delile) in Fethiye-Göcek Specially Protected Area (Eastern Mediterranean Sea, Turkey). In: Micallef, A. (ed.), MCRR3-2010 Conference Proceedings, Journal of Coastal Research, Special Issue, No. 61, pp. 417-420. Grosseto, Tuscany, Italy, ISSN 0749-0208.This paper aims to describe the impacts anchoring structure seagrass Posidonia Delile meadows This area, hosting five...

10.2112/si61-001.51 article EN Journal of Coastal Research 2011-12-01

The present paper reports the first occurrence of Polydora cornuta in Bosphorus Strait and its finding a new locality Sea Marmara, providing link with Aegean Black populations. probable vector for introduction P. into Marmara is shipping through Dardanelles Strait. Both soft hard-bottom populations were examined importance prevalence this species within native macrozoobenthic communities elucidated. Its abundance ranged between 40 3390 ind.m-2 (mean:1320 ±1199.45 SD) percent contribution to...

10.12681/mms.140 article EN cc-by-nc Mediterranean Marine Science 2008-05-30

In this paper, a biotic index (Bentix) has been used for the assessment of ecological quality status shallow water hard substrate benthic ecosystems affected by coastal sewage discharges in Bosphorus Strait. A significant difference was observed between control and discharge stations with regard to Bentix values (Mann-Whitney U Test, p=0.002) worse than that controls. The revealed caused serious disturbance macrozoobenthic communities area investigated. Although so far it soft bottom...

10.12681/mms.160 article EN cc-by-nc Mediterranean Marine Science 2007-06-01

Recently, population genetic studies of Mediterranean marine species highlighted patterns divergence and phylogeographic breaks, due to the interplay between impacts Pleistocene climate shifts contemporary hydrographical barriers. These factors markedly shaped distribution organisms their makeup. The present study is part an ongoing effort understand phylogeography evolutionary history highly dispersive green crab, Carcinus aestuarii (Nardo, 1847), across Sea. marked two separated...

10.1186/s12862-018-1167-4 article EN cc-by BMC Evolutionary Biology 2018-04-11

To date, the only alien xanthid crab recorded from Mediterranean is Atergatis roseus (Ruppell, 1830). This species was first collected off Israel in 1961 and now common along Levantine coast. Recently a second species, Actaea savignii (H. Milne Edwards, 1834), found Turkey. A single adult specimen Haifa Bay 2010, two specimens were captured Mersin, Turkey 2011. Repeatedly reported Suez Canal since 1924, record of populations A. testament to ongoing Erythraean invasion Sea.

10.3391/bir.2013.2.2.09 article EN cc-by BioInvasions Records 2013-01-01

In this paper, we describe the pelagic and benthic ecosystem of Golden Horn estuary opening into Marmara Sea. To improve water quality estuary, which had long been subject to severe anthropogenic pollution (industrial, chemical, shipping), industrial facilities were moved from in 1980s, followed by a rehabilitation plan 1990s. Our results, based on chemical parameters phytoplankton showed some signs improvement conditions upper layer. However, macrozoobenthic findings study did not reflect...

10.12681/mms.78 article EN Mediterranean Marine Science 2010-10-08

Two new species of flatworms, Pleioplana bosphorensis sp. nov. and Okusi nov., Acotylea, Polycladida, are described from the shallow rocky shores Turkish Straits System, northwestern Turkey. Both characterized by a prostatic vesicle atomata-type, stylet Lang's vesicle. possesses body fleshy consistency without tentacles, with spermiducal bulbs; elongated seminal rounded four tubular chambers conical, strong, large straight stylet. has translucent body, tentacular knobs, vesicle, six...

10.1080/00222930903094662 article EN Journal of Natural History 2009-09-11

Foraminiferal assemblages of the coasts Samandağ and Yayladaği (Hatay, SE Turkey), were investigated. Species composition assemblage abundance some dominant species determined. Indo-Pacific originated alien found to be as it is case on southwestern coast Turkey. Amphistegina lobifera Larsen was most abundant Pararotalia calcariformata McCulloch also showed extensive in sampling sites. Siphonina tubulosa Cushman recorded first time Mediterranean.

10.30897/ijegeo.306470 article EN International Journal of Environment and Geoinformatics 2016-08-02

A new species of flabelligerid polychaete, Flabelliderma cinari, is described from the Turkish coast Eastern MediterraneanSea. This represents first occurrence genus in Mediterranean. cinari sp. nov. isclosely allied to F. claparedei having dorsal tubercles two different sizes; however, these differ relative shapeand number tubercles, capillaries per fascicle notopodia and shape curved distal articlesin neuropodial hooks.

10.12681/mms.296 article EN cc-by-nc Mediterranean Marine Science 2012-09-07

The alien muricid gastropod Ergalatax junionae Houart, 2008 has been known to inhabit the shallow waters of eastern Mediterranean. chronology its recorded observations, beginning in Turkey and proceeding south west, suggests that it was first introduced via shipping, then spread Levantine Sea. recent record from Greece indicates range distribution is still expanding. Here we report local population densities additional records E. Mediterranean basin, including occurrence Turkish coastof Aegean

10.12681/mms.128 article EN cc-by-nc Mediterranean Marine Science 2009-06-01

The natural distribution of the Japanese sea cucumber (Apostichopus japonicus Selenka, 1867), a species, is characterized by Northwest Pacific. Long-term monitoring studies from 2020 to 2024 document significant deviation known A. and its ability extensively colonize Gulf Izmit, easternmost part Sea Marmara. This record also first documentation species Mediterranean Sea. Population data extracted 67 samples allowed determination size weight distribution, length-weight relationship, condition...

10.33714/masteb.1439845 article EN cc-by Marine Science and Technology Bulletin 2024-03-12
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